KR20130038500A - Emission reduction method for engine - Google Patents

Emission reduction method for engine Download PDF

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Publication number
KR20130038500A
KR20130038500A KR1020110102888A KR20110102888A KR20130038500A KR 20130038500 A KR20130038500 A KR 20130038500A KR 1020110102888 A KR1020110102888 A KR 1020110102888A KR 20110102888 A KR20110102888 A KR 20110102888A KR 20130038500 A KR20130038500 A KR 20130038500A
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South Korea
Prior art keywords
failure
injection timing
engine
determined
egr device
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KR1020110102888A
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Korean (ko)
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안병훈
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현대자동차주식회사
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Priority to KR1020110102888A priority Critical patent/KR20130038500A/en
Publication of KR20130038500A publication Critical patent/KR20130038500A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/90—Driver alarms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

PURPOSE: A harmful emissions reduction method of an engine is provided to delay fuel injection timing in case the failure of an EGR(Exhaust Gas Recirculation) device is determined, thereby reducing the amount of emitted NOx increased by the failure of the EGR device. CONSTITUTION: A harmful emissions reduction method of an engine comprises the following steps. The failure of an EGR(Exhaust Gas Recirculation) device is determined(S10). The warning light is turned on in case the failure of the EGR device is determined(S20). The fuel injection timing of engine is delayed in case the failure of the EGR device is determined(S30). [Reference numerals] (AA) Start; (BB,CC) Determining a fuel injection timing from a fuel injector map in a normal condition; (DD) Correcting the fuel injection timing; (EE) Injecting fuel; (S10) Failure of EGR device related parts?; (S20) Turning on a warning light;

Description

엔진의 유해 배출물 저감 방법{EMISSION REDUCTION METHOD FOR ENGINE}Reduction of harmful emissions from engines {EMISSION REDUCTION METHOD FOR ENGINE}

본 발명은 엔진의 유해 배출물 저감 방법에 관한 것으로서, 보다 상세하게는 디젤엔진의 EGR관련 부품의 고장 발생시 NOx의 과다 배출을 억제할 수 있도록 하는 기술에 관한 것이다.The present invention relates to a method for reducing harmful emissions of an engine, and more particularly, to a technology for suppressing excessive emission of NOx when a failure of an EGR-related component of a diesel engine occurs.

지구 온난화 방지와 대기환경 보호를 위하여, 자동차의 배출가스에 대한 규제가 점차 엄격히 강화되고 있는 추세인 바, 특히 온실가스인 이산화탄소에 대한 저감요구가 크게 증가하고 있으며, 디젤차량의 NOx와 PM에 대한 규제가 더욱 강화되고 있고, 그에 따라 배기가스의 비정상적 배출 상태를 진단하는 OBD규제 역시 강화되고 있는 추세이다.
In order to prevent global warming and protect the air environment, regulations on automobile emissions have been tightened gradually. In particular, the demand for reduction of carbon dioxide, a greenhouse gas, has been greatly increased. Regulations are being tightened and the OBD regulations for diagnosing abnormal emissions of exhaust gases are also being tightened.

차량의 제반 시스템이 정상적인 상황에서 배기가스 규제를 만족함은 필수적인 것이며, 차량의 유해 배출물에 관여하는 부품의 고장 발생시에도 OBD규제를 만족하여야 하고, 이 규제를 초과하는 경우에는 경고등을 점등하여 운전자로 하여금 서비스센터에서 손상된 부품의 정비를 유도하도록 하고 있다.
It is essential that the vehicle's system meets the exhaust gas regulation under normal circumstances, and the OBD regulation should be satisfied even in the event of failure of the parts related to the hazardous emissions of the vehicle. Service centers are required to guide the maintenance of damaged parts.

유해 배출물 관련 부품의 고장 발생시 관련 법규를 충족시키기 가장 어려운 상황은 냉각수온센서나 EGR밸브 고장 등에 의해 EGR장치를 사용할 수 없어서 NOx가 증가하는 경우로서, EURO-5의 EOBD(European On-Board Diagnostics) 규제에 의하면, 이와 같이 EGR장치의 고장으로 EGR에 의한 NOx저감이 이루어지지 못하는 경우에도 0.648g/km 이내의 범위를 유지하면서 서비스센터로 이동할 수 있어야 하는데, 이는 종전의 EURO-4 기준인 1.44g/km에 비하여 44%수준에 불과하여 크게 규제가 강화된 것임을 알 수 있다.
The most difficult situation to meet the relevant legislation in the event of the failure of hazardous emission-related parts is the increase of NOx due to the failure of the EGR system due to cooling water temperature sensor or EGR valve failure, etc. According to the regulation, even if the failure of the EGR device prevents the reduction of NOx by EGR, it should be able to move to the service center while maintaining the range within 0.648g / km, which is 1.44g Compared to / km, it is only 44%, indicating that the regulation has been tightened.

상기와 같이 점차 강화되고 있는 유해 배출물 관련 각종 법규들을 충족시키기 위해, 엔진의 연소기술 향상 및 후처리 장치의 장착 등이 선택적으로 또는 함께 이루어지고 있는데, 가급적 후처리 장치를 사용하지 않거나 저단가의 부품을 사용하고도 법규를 만족시킬 수 있도록 하여 차량의 원가를 절감할 수 있도록 하는 것이 바람직하다고 볼 수 있다.
In order to satisfy the various regulations related to the harmful emissions gradually strengthened as described above, the improvement of combustion technology of the engine and the installation of the aftertreatment device are selectively or jointly performed. It can be seen that it is desirable to reduce the cost of the vehicle by using it to satisfy the law.

상기의 발명의 배경이 되는 기술로서 설명된 사항들은 본 발명의 배경에 대한 이해 증진을 위한 것일 뿐, 이 기술분야에서 통상의 지식을 가진 자에게 이미 알려진 종래기술에 해당함을 인정하는 것으로 받아들여져서는 안 될 것이다.The matters described as the background of the above-described invention are merely for the purpose of improving the understanding of the background of the present invention, and are accepted as acknowledging that they correspond to the prior art already known to those skilled in the art. I will not.

KRKR 10199900052101019990005210 AA

본 발명은 차량의 배기가스 후처리 장치를 사용하지 않거나 의존도를 낮추면서도, EGR장치의 고장으로 EGR에 의한 NOx의 저감이 불가한 상황에서도 효과적으로 NOx의 배출량을 저감시킬 수 있도록 함으로써, 차량의 원가를 절감하면서도, 각종 법규를 충족시킴과 아울러 차량의 상품성을 향상시킬 수 있도록 한 엔진의 유해 배출물 저감 방법을 제공함에 그 목적이 있다.The present invention can reduce the cost of the vehicle by effectively reducing the emission of NOx even when the exhaust gas aftertreatment device of the vehicle is not used or the dependency of the vehicle is reduced, even when the reduction of the NOx due to the failure of the EGR device is impossible. The purpose of the present invention is to provide a method of reducing harmful emissions of an engine that can satisfy various regulations and improve vehicle commerciality.

상기한 바와 같은 목적을 달성하기 위한 본 발명 엔진의 유해 배출물 저감 방법은Hazardous emissions reduction method of the engine of the present invention for achieving the above object is

EGR장치의 고장을 판단하는 고장판단단계와;A failure determination step of determining a failure of the EGR device;

EGR장치의 고장이라고 판단되면 경고등을 점등하는 경고등점등단계와;A warning light lighting step of lighting a warning light when it is determined that the EGR device is malfunctioning;

EGR장치의 고장이라고 판단되면 엔진의 연료분사시기를 지각시키는 분사시기조정단계;An injection timing adjustment step of recognizing the fuel injection timing of the engine when it is determined that the EGR device is broken;

를 포함하여 구성된 것을 특징으로 한다.And a control unit.

본 발명은 차량의 배기가스 후처리 장치를 사용하지 않거나 의존도를 낮추면서도, EGR장치의 고장으로 EGR에 의한 NOx의 저감이 불가한 상황에서도 효과적으로 NOx의 배출량을 저감시킬 수 있도록 함으로써, 차량의 원가를 절감하면서도, 각종 법규를 충족시킴과 아울러 차량의 상품성을 향상시킬 수 있도록 한다.The present invention can reduce the cost of the vehicle by effectively reducing the amount of NOx even when the exhaust gas aftertreatment device of the vehicle is not used or the dependence is reduced, even when the EGR device is unable to reduce the NOx by the EGR. While reducing costs, it can meet various regulations and improve the vehicle's marketability.

도 1은 본 발명에 따른 엔진의 유해 배출물 저감 방법의 실시예를 도시한 도면,
도 2는 본 발명에 따른 엔진의 유해 배출물 저감 방법의 다른 실시예를 도시한 도면이다.1 is a view showing an embodiment of a method for reducing harmful emissions of an engine according to the present invention;
2 is a view showing another embodiment of a method for reducing harmful emissions of an engine according to the present invention.

도 1과 도 2를 참조하면, 본 발명 실시예의 엔진의 유해 배출물 저감 방법은 EGR장치의 고장을 판단하는 고장판단단계(S10)와; EGR장치의 고장이라고 판단되면 경고등을 점등하는 경고등점등단계(S20)와; EGR장치의 고장이라고 판단되면 엔진의 연료분사시기를 지각시키는 분사시기조정단계(S30)를 포함하여 구성된다.
1 and 2, the method for reducing harmful emissions of the engine of the embodiment of the present invention includes a failure determination step (S10) of determining a failure of the EGR device; A warning light lighting step (S20) for lighting a warning light when it is determined that the EGR device is broken; If it is determined that the EGR device is a failure, the injection timing adjustment step (S30) for retarding the fuel injection timing of the engine is configured.

즉, 차량의 주행 중 상기 고장판단단계(S10)에 의해 EGR장치의 고장이 판단되면, 경고등을 점등하여 운전자로 하여금 서비스센터로 가도록 유도함과 아울러, 서비스센터에 이르는 동안 EGR장치를 사용하지 못함에 의해 증가하는 NOx의 배출량을 엔진의 연료분사시기를 지각시킴에 의해 저감하여 각종 법규를 만족시킬 수 있도록 하는 것이다.
That is, when it is determined that the failure of the EGR device by the fault determination step (S10) while driving the vehicle, the warning light is turned on to induce the driver to go to the service center, and the EGR device cannot be used while reaching the service center. By reducing the fuel injection timing of the engine by increasing the amount of NOx emissions caused by the engine to satisfy various laws and regulations.

상기 고장판단단계(S10)에서는 엔진 냉각수온센서가 고장이라고 판단되거나 EGR밸브의 고착이 판단되면, EGR장치의 고장으로 판단한다.
In the fault determination step (S10), if it is determined that the engine coolant temperature sensor is a failure or the fixation of the EGR valve, it is determined that the EGR device is broken.

상기 경고등점등단계(S20)는 상기 고장판단단계(S10) 수행결과 EGR장치의 고장이 판단되면 즉시 수행되고, 상기 분사시기조정단계(S30)는 상기 경고등점등단계(S20)와 함께 개시되어, 차량이 서비스센터로 이동되는 동안 계속적으로 수행된다.
The warning light step (S20) is immediately performed when it is determined that the failure of the EGR device as a result of the failure determination step (S10), the injection timing adjustment step (S30) is started with the warning light step (S20), the vehicle Continued while moving to this service center.

상기 분사시기조정단계(S30)에서는 정상 상태의 연료분사시기에, EGR장치 고장에 따른 보정치를 보정 연산하여 연료분사시기를 결정하거나, 정상 상태의 연료분사시기맵을 EGR장치 고장시에 대비한 보조분사시기맵으로 대체하여 연료분사시기를 결정하는 방법이 사용될 수 있을 것인바, 도 1의 실시예에서는 정상상태의 연료분사시기맵으로부터 구해진 연료분사시기에 보정치를 연산하여 결정된 연료분사시기에 따라 연료를 분사하도록 하고, 도 2의 실시예에서는 EGR장치의 고장이 판단되기 전까지 사용되던 정상상태의 연료분사시기맵을 별도로 EGR장치의 고장에 대비하여 구비하여둔 보조분사시기맵으로 대체하여 연료분사시기를 결정하고, 그에 따라 연료를 분사하도록 하고 있다.
In the injection timing adjustment step (S30), the fuel injection timing is determined by correcting and calculating the correction value according to the failure of the EGR device at the steady state fuel injection timing, or assisting in preparing the steady state fuel injection timing map at the time of the EGR device failure. The method of determining the fuel injection timing may be used instead of the injection timing map. In the embodiment of FIG. 1, the fuel is determined according to the fuel injection timing determined by calculating a correction value at the fuel injection timing obtained from the steady state fuel injection timing map. In the embodiment of FIG. 2, the fuel injection timing map is replaced with the auxiliary injection timing map separately provided for the failure of the EGR apparatus. To determine and inject fuel accordingly.

본 발명은 상기한 바와 같이 EGR장치를 구성하는 부품들의 고장에 의해 EGR장치를 정상적으로 구동하지 못하여 증가하되는 NOx의 양을, 연료분사시기를 지각하여 저감할 수 있도록 하여, 차량이 서비스센터까지 이동하는 동안 차량의 유해 배출물 관련 각종 법규를 만족시킬 수 있도록 하는 것이다.
The present invention enables the vehicle to move to a service center by reducing the amount of NOx that increases due to failure of the components constituting the EGR device due to failure of the EGR device, due to the fuel injection timing. In doing so, it is necessary to satisfy various laws related to harmful emissions of vehicles.

물론, 본 발명은 상기한 바와 같은 연료분사시기의 제어에 의해 차량에 배기가스 후처리 장치를 별도로 구비하지 않도록 할 수도 있고, 경우에 따라서는 보다 저렴한 비용의 후처리 장치만으로, 각종 배기가스 규제를 만족시키도록 하는 데에 기여할 수 있다.
Of course, the present invention can also prevent the vehicle from having an exhaust gas aftertreatment device separately by controlling the fuel injection timing as described above. It can contribute to making it satisfied.

본 발명은 특정한 실시예에 관련하여 도시하고 설명하였지만, 이하의 특허청구범위에 의해 제공되는 본 발명의 기술적 사상을 벗어나지 않는 한도 내에서, 본 발명이 다양하게 개량 및 변화될 수 있다는 것은 당업계에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

S10; 고장판단단계
S20; 경고등점등단계
S30; 분사시기조정단계S10; In the failure determination step
S20; Warning light stage
S30; Injection timing step

Claims (6)

EGR장치의 고장을 판단하는 고장판단단계(S10)와;
EGR장치의 고장이라고 판단되면 경고등을 점등하는 경고등점등단계(S20)와;
EGR장치의 고장이라고 판단되면 엔진의 연료분사시기를 지각시키는 분사시기조정단계(S30);
를 포함하여 구성된 것을 특징으로 하는 엔진의 유해 배출물 저감 방법.A failure determination step (S10) of determining a failure of the EGR device;
A warning light lighting step (S20) for lighting a warning light when it is determined that the EGR device is broken;
An injection timing adjusting step (S30) of retarding the fuel injection timing of the engine when it is determined that the EGR device is broken;
Hazardous emissions reduction method of the engine, characterized in that configured to include. 청구항 1에 있어서,
상기 경고등점등단계(S20)는 상기 고장판단단계(S10) 수행결과 EGR장치의 고장이 판단되면 즉시 수행되고;
상기 분사시기조정단계(S30)는 상기 경고등점등단계(S20)와 함께 개시되어, 차량이 서비스센터로 이동되는 동안 계속적으로 수행되는 것
을 특징으로 하는 엔진의 유해 배출물 저감 방법.The method according to claim 1,
The warning light lighting step (S20) is immediately performed when it is determined that the failure of the EGR device as a result of the failure determination step (S10);
The injection timing adjustment step (S30) is started with the warning light step (S20) to be performed continuously while the vehicle is moved to the service center
Hazardous emissions reduction method of the engine, characterized in that. 청구항 1에 있어서,
상기 분사시기조정단계(S30)에서는 정상 상태의 연료분사시기에, EGR장치 고장에 따른 보정치를 보정 연산하여 연료분사시기를 결정하는 것
을 특징으로 하는 엔진의 유해 배출물 저감 방법.The method according to claim 1,
In the injection timing adjustment step (S30), at the fuel injection timing in a steady state, by calculating the correction value according to the failure of the EGR device to determine the fuel injection timing
Hazardous emissions reduction method of the engine, characterized in that. 청구항 1에 있어서,
상기 분사시기조정단계(S30)에서는 정상 상태의 연료분사시기맵을 EGR장치 고장시에 대비한 보조분사시기맵으로 대체하여 연료분사시기를 결정하는 것
을 특징으로 하는 엔진의 유해 배출물 저감 방법.The method according to claim 1,
In the injection timing adjustment step (S30) to determine the fuel injection timing by replacing the fuel injection timing map in the steady state with an auxiliary injection timing map in case of failure of the EGR device.
Hazardous emissions reduction method of the engine, characterized in that. 청구항 1에 있어서,
상기 고장판단단계(S10)에서는 엔진 냉각수온센서가 고장이라고 판단되면, EGR장치의 고장으로 판단하는 것
을 특징으로 하는 엔진의 유해 배출물 저감 방법.The method according to claim 1,
In the failure determination step (S10), if it is determined that the engine coolant temperature sensor is a failure, it is determined that the failure of the EGR device
Hazardous emissions reduction method of the engine, characterized in that. 청구항 1에 있어서,
상기 고장판단단계(S10)에서는 EGR밸브의 고착이 판단되면, EGR장치의 고장으로 판단하는 것
을 특징으로 하는 엔진의 유해 배출물 저감 방법.The method according to claim 1,
In the fault determination step (S10), if it is determined that the EGR valve is stuck, it is determined that the failure of the EGR device
Hazardous emissions reduction method of the engine, characterized in that.
KR1020110102888A 2011-10-10 2011-10-10 Emission reduction method for engine KR20130038500A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015003992A1 (en) * 2013-07-08 2015-01-15 Jaguar Land Rover Limited Method and system for controlling a vehicle powertrain

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015003992A1 (en) * 2013-07-08 2015-01-15 Jaguar Land Rover Limited Method and system for controlling a vehicle powertrain
CN105378253A (en) * 2013-07-08 2016-03-02 捷豹路虎有限公司 Method and system for controlling a vehicle powertrain
CN105378253B (en) * 2013-07-08 2018-07-13 捷豹路虎有限公司 Method and system for controlling vehicle engine assembly
US10023194B2 (en) 2013-07-08 2018-07-17 Jaguar Land Rover Limited Method and system for controlling a vehicle powertrain

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